Having sat in the dark for a couple of years, the orienteer decided to realign his affiliation. No longer describing himself as an orienteer, he managed to change the bulb without major incident. In fact, it was still dark, so noone noticed the bulb-change or the almost indiscernible change in attitude of the former orienteer. Apparently the lighting problem was something more serious. Maybe a dripping pipe in the wall was causing an earthing problem and tripping the fuse-box.